diff options
Diffstat (limited to 'lib/Lex/Lexer.cpp')
-rw-r--r-- | lib/Lex/Lexer.cpp | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp index 5132d0e62c..67dcff6b71 100644 --- a/lib/Lex/Lexer.cpp +++ b/lib/Lex/Lexer.cpp @@ -1212,18 +1212,12 @@ const char *Lexer::SkipEscapedNewLines(const char *P) { } } -/// \brief Checks that the given token is the first token that occurs after the -/// given location (this excludes comments and whitespace). Returns the location -/// immediately after the specified token. If the token is not found or the -/// location is inside a macro, the returned source location will be invalid. -SourceLocation Lexer::findLocationAfterToken(SourceLocation Loc, - tok::TokenKind TKind, - const SourceManager &SM, - const LangOptions &LangOpts, - bool SkipTrailingWhitespaceAndNewLine) { +Optional<Token> Lexer::findNextToken(SourceLocation Loc, + const SourceManager &SM, + const LangOptions &LangOpts) { if (Loc.isMacroID()) { if (!Lexer::isAtEndOfMacroExpansion(Loc, SM, LangOpts, &Loc)) - return SourceLocation(); + return None; } Loc = Lexer::getLocForEndOfToken(Loc, 0, SM, LangOpts); @@ -1234,7 +1228,7 @@ SourceLocation Lexer::findLocationAfterToken(SourceLocation Loc, bool InvalidTemp = false; StringRef File = SM.getBufferData(LocInfo.first, &InvalidTemp); if (InvalidTemp) - return SourceLocation(); + return None; const char *TokenBegin = File.data() + LocInfo.second; @@ -1244,15 +1238,25 @@ SourceLocation Lexer::findLocationAfterToken(SourceLocation Loc, // Find the token. Token Tok; lexer.LexFromRawLexer(Tok); - if (Tok.isNot(TKind)) + return Tok; +} + +/// \brief Checks that the given token is the first token that occurs after the +/// given location (this excludes comments and whitespace). Returns the location +/// immediately after the specified token. If the token is not found or the +/// location is inside a macro, the returned source location will be invalid. +SourceLocation Lexer::findLocationAfterToken( + SourceLocation Loc, tok::TokenKind TKind, const SourceManager &SM, + const LangOptions &LangOpts, bool SkipTrailingWhitespaceAndNewLine) { + Optional<Token> Tok = findNextToken(Loc, SM, LangOpts); + if (!Tok || Tok->isNot(TKind)) return SourceLocation(); - SourceLocation TokenLoc = Tok.getLocation(); + SourceLocation TokenLoc = Tok->getLocation(); // Calculate how much whitespace needs to be skipped if any. unsigned NumWhitespaceChars = 0; if (SkipTrailingWhitespaceAndNewLine) { - const char *TokenEnd = SM.getCharacterData(TokenLoc) + - Tok.getLength(); + const char *TokenEnd = SM.getCharacterData(TokenLoc) + Tok->getLength(); unsigned char C = *TokenEnd; while (isHorizontalWhitespace(C)) { C = *(++TokenEnd); @@ -1269,7 +1273,7 @@ SourceLocation Lexer::findLocationAfterToken(SourceLocation Loc, } } - return TokenLoc.getLocWithOffset(Tok.getLength() + NumWhitespaceChars); + return TokenLoc.getLocWithOffset(Tok->getLength() + NumWhitespaceChars); } /// getCharAndSizeSlow - Peek a single 'character' from the specified buffer, |